Browsing by Author "ALJARAI, Sumaia Ahmed Muftah"
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thesis.listelement.badge PREPARATION AND CHARACTERIZATION OF PALLADIUM NANOPARTICLES ADDED POLYTHIOPHENE FOR HYDROGEN PRODUCTION FROM AMMONIA BORANE(2017-06-02) ALJARAI, Sumaia Ahmed Muftah; KAYA, MuratNowadays, nanostructured catalysts gain great attention due to their high catalytic activities in various types of reactions. For this reason more efforts have been devoted to develop more efficient ways to produce catalysts with desired sizes. To prepare an effective nanocatalyst, one of the main parameter is to prepare proper support materials. It keeps the activity constant by preventing nanoparticles from agglomeration and increases the reuse performance by giving easy isolation properties. Among the support materials, polymers can be considered as good candidates due to their cheap and easy preparation ways and stabilites. Hydrogen energy is considered as one of the most promising green energy resources. Therefore, the design and production of proper catalysts, which can be used in the production of hydrogen from the storage materials is so important. Among the solid hydrogen storage materials like metal hydrides, chemical hydrides, organic molecules, metal organic frameworks and carbon nanotubes, ammonia borane (AB) considered as one of the most effective hydrogen storage material. The hydrogen content of AB is 19.6 wt % and it is nontoxic and stable under air and water. With the usage of suitable and effective catalyst, it is possible to take all hydrogen from AB at moderate conditions. For this reason, production of highly efficient catalysts to enhance the catalytic parameters in the production of hydrogen from AB is of great importance for the development of hydrogen energy and its extensive usage. In this thesis, to produce catalyst for hydrogen generation from aqueous AB under mild condition a novel support material, polythiophene, was used to immobilize the palladium nanoparticles by using a wet impregnation method. The prepared catalyst shows good catalytic activity at 25 °C. An initial turnover frequency (TOF) value is calculated as 28.9 min-1 . Furthermore, PdNPs, which are loaded on polythiophene support, show high stability and reuse property.